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Old 07-16-2017, 12:57 PM   #2
fdryer
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Join Date: Jan 2006
Location: NYC
Posts: 39,201
 

2003 L-Series 3.0L Sedan
Default Re: 2009 Astra Diagnostic Error Codes, diagnostic help needed

P0300 is a general misfire for all four cylinders, P0301 is for misfiring in cylinder #1. If you search past threads within the Astra forums, you may see a repeating failure pattern of coil packs.

Googling for each error code will provide many sites with code definitions.

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